A closer inspection of a grain boundary immune to intergranular corrosion in a sensitised Al-Mg alloy

Ruifeng Zhang*, Yao Qiu, Yuanshen Qi, Nick Birbilis

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

21 Scopus citations

Abstract

The intergranular corrosion of Al-Mg alloys arises from sensitisation due to thermal exposure. Here, a protected low angle (8.7°) grain boundary which hinders the intergranular corrosion propagation in a sensitised (150°/7 d) Al-Mg alloy was studied in detail. Discrete β-phase was observed on this protected boundary, but with a lower continuity compared to the other fully (or partially) dissolved grain boundaries. The results herein seek to unify the relationship between β-phase continuity and grain boundary misorientation angle as critical for intergranular corrosion propagation in the studied alloy.

Original languageEnglish
Pages (from-to)1-5
Number of pages5
JournalCorrosion Science
Volume133
DOIs
StatePublished - 1 Apr 2018
Externally publishedYes

Keywords

  • A. Alloy
  • A. Aluminium
  • B. SEM
  • B. TEM
  • C. Intergranular corrosion

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